Toshiba SD-K530SU Service Manual page 69

3. Y/C CIRCUIT
(4) When the Video signal doesn't appear on the screen in REC Mode,
Is the EE signal normal?
YES
Is 5.2V/5.3VA applied to the
IC301 Pins 4, 22, 47, 60, 84?
YES
Does PB Mdoe operate
normally?
YES
Does the REC RF signal
appear at the IC301
Pin76?
YES
Does the REC RF signal
appear at the IC301
Pins86, 90?
YES
Check the Drum &
Drum Connector.
NO
Check EE Mode.
NO
Check the SW 5V/ 5.3VA
Line.(Power Circuit)
NO
Check PB Mode.
Does the REC "H"(4V~5V)
NO
signal appear at the Q303,
Q307 Base?
Check the REC Luminance
Pass and Color Pass.
3-14
NO
YES
NO
Check the system of
REC"H"(IC501 pin74)
Replace the IC301.